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The people that know about dnsmasq are going to need to know what version you are running and what your config looks like.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dnsmasq-discuss <dnsmasq-discuss-bounces@lists.thekelleys.org.uk> on behalf of Niten Jaiswal via Dnsmasq-discuss <dnsmasq-discuss@lists.thekelleys.org.uk><br>
<b>Sent:</b> Tuesday, January 20, 2026 9:32 PM<br>
<b>To:</b> dnsmasq-discuss@lists.thekelleys.org.uk <dnsmasq-discuss@lists.thekelleys.org.uk><br>
<b>Subject:</b> [Dnsmasq-discuss] Potential memory leak</font>
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Hi!</div>
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I’m a user of opnsense and have migrated to dnsmasq for DHCPv4 and v6 services. However, dnsmasq randomly stops functioning and I need to manually restart it to restore DHCP services to my network. I’ve been troubleshooting the issue on the opnsense form
on the following thread:</div>
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<a href="https://forum.opnsense.org/index.php?topic=49552.30" data-outlook-id="4086ce43-e834-4fc5-850e-16a501ec39fb">https://forum.opnsense.org/index.php?topic=49552.30</a></div>
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My basic testing points to an issue with serving DHCPv6 addresses. When I have router advertisement set to unmanaged the memory consumption of dnsmasq was fairly stable. When router advertisement is set to managed then dnsmasq begins consuming more and more
memory.. </div>
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Let me know if you need additional information. I was asked to post to the email list by an opnsense forum moderator.</div>
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TIA</div>
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Niten</div>
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